Hugh dick



(No Model.)

H. DICK.

DEVICE FOR SHARPENING HARROW DISKS.

Patented Dec. 13, 1887.

IJV'V'ENTOR WITNESSES N, PETERS. Fholo'Lllhogmphar. Washingmn U, C,

.NITED STATES PATENT OFFICE,

HUGH DICK, or THREE MILE BAY, NEW YORK.

DEVICE SHARPENING HARROW-DISKS.

SPECIFICATION forming part of Letters Patent No. 374,782, dated December13, 1887.

(No model.)

To all whom it may concern:

Be it known that I, HUGH DICK, a citizen of the United States, and aresident of Three Mile Bay, in the county of Jefferson and State of NewYork, have invented certain new and useful Improvements in DevicesforSharpening Pulverizer Wheels or Disks; and I do hereby declare thatthe following is a full, clear, and exact description of the invention,which will enable others skilled in the art to which it appertains tomake and use the same, reference being had to theaccompanyingdrawings,which forina part of thisspecification, andin which- Figure 1 is a sideview of my improved device or tool for sharpening pulverizer wheels ordisks, showing the same in its operative position. Fig. 2 isaperspective view of the device or tool, and Fig. 3 is a similar view 1taken at right angles to Fig. 2.

, they are mounted and without takingthe pu'l- These parts areintroduced in the drawings in A is flattened and formed with atransverse semicircular recess, E, as shown, and on each side of thisrecess is arranged a turn-button,

F F, these turn-buttons being formed each with a threaded stem or shank,F F, which fits and turns in a threaded opening in the body A at thosepoints, these turn-buttons being adapted topass through end slots, H H,in the end portions of a casting or box, I, which is made flat, and isformed at the central point of its inner side with a semicircularrecess, .J, adapted to register with the semicircular recess E of thebody A. My improved tool or sharpener is placed in operative position onthe shaft aof aharrow or pulverizer to sharpen the rotary disks of thepulverizer without removing the said cutting-disks from the machine orharrow by placing the tool or body A close to the side of the rotarydisk I), with the shaft a resting in the semicircular recess E and thehooked inner end of the tool extending over the edge of the circulardisk, so that the inner end of the adj usting-screw IE will come incontact with what may be called the inner face or concave side of thecircular disk, when the tool is secured in operative position on thebarrow-shaft a by placing the box or casing I on the other side of theharrow shaft, so that the other side of the said shaft will be inclosedin the semicircular recess J in the inner side of the box I, the headsof the turn-buttons F F being turned so as to pass through the endslots, H H, of the box or hearing I when placing the box I in position,and the buttons are then turned for a half-turn, so as to effectuallysecure the box Iin position and hold the sharpener firmly in itsoperative position on the barrow-shaft.

I prefer to construct the turnbuttons as described, with the threadedstems or shanks fitting in threaded apertures in the body A, as by meansof thisconstruction the buttons can be adjusted, screwed in or out, soas to suit any size of barrow-shaft, so that shafts of varying diametercan be inclosed between the bearing I and the side of the body A, andthe tool is thus made adaptable for any harrow or cultivator usingcircular cutting-disks.

Below the turn-buttons F the body A is formed with a longitudinal slot,K, as shown, and the adjustable knife block orsbearingL is adjustablysecured to this slotted portion of I00 which passes the end of ascrew'bolt, N, having a head at one end, and passing through the .upperend or part of the body-slot K and or shank S of the sharpening-blade S,the said stem being square or rectangular in cross-section to fit theslot L and to prevent it from turning therein. The outer longitudinaloperative edge of this blade is beveled and sharpened, as shown, so thatone end or point is higher than the other.

The tool having been secured on the harrowshaft, as described, and shownin Fig. 1 of the drawings, the knife-block L, carrying thesharpening-knife S, is then adjusted either nearer to or farther fromthe shaft or center of the disk to be sharpened by loosening the nuts ofthe end screws of the knife-block and moving the said screws with theblock either up or down in the slot of the body A, by which meansthesharpening-knife S can be adjusted to suit a disk of any size,according to the diameter of the said disk.

The knife-block having been thus adjusted up or down on the slotted bodyA, the nut at its upper end is tightened to secure the block at thatpoint of the said longitudinal slot K, and the lower end of theknife-block is then adjusted or moved to either side, turning on theupper screw-bolt, N, as on a pivot, to adjust the angle of thecutting-blade according to the curvature of the disk to be sharpened,moving thelower slotted end of the knife-supporting block L toward thedisk giving a shorter bevel, while moving the said end away from thedisk will give a longer bevel to the cutting-edge of the disk, as willbe readily understood by reference to the several views of the drawings,especially Fig. 1 thereof, and when the proper angle of thecutting-blade has been secured the lower end of the knifeblock issecured in its adjusted position by tightening the nut of the lowerscrew, which passes through the transverse slot in the lower end of theknife-block, a washer being preferably placed between thesaid nut andthe outer surface of the slotted lower end of the nut, as shown.

By adjusting the set-screw or adj ustingscrew E in the extremity of thecurved end of the tool,the inner end of this screw bearing against theconcave face of the disk, and also by adjusting in or out thesharpening-blade, which is secured in position in the knife-blockadjustably and removably by means of a set screw, 8, the precise angleof the cutting-edge of the blade S with reference to the disk to besharpened can be accurately adj usted, as will be readily seen. By meansof the adjustable set-screw E and the adjustable sharpeningblade thetool may be applied to or on the shaft of any harrow and be used withoutcoming into contact with the boxes between the several disks or bearingsand at the point where the tongueis attached.

When the tool has been secured on the shaft and the several partsadjusted, as described, to give the proper angle to the cutting orsharpening edge of the blade S, the tool is operated by reciprocating itby means of its rounded end handle, B, reversing or drawing it back atthe end of each stroke, the beveled and sharpened end or edge of theblade S cutting or sharpening on each back-stroke.

The end disk on the shaft is sharpened on its inner side by adjustingthe sharpener'on the shaft on the inner side of the said disk,'

and by reversing the sharpening-blade S in the adjustable knife-blockthe inner side of the edge of the end disk can be readily sharpened, aswill be readily understood.

From the foregoing description, taken in connection with theaccompanying drawings,

' the construction, operation, and advantages of my invention will bereadily understood.

It will be seen that my new and improved tool or implement forsharpening harrow or pulverizer wheels or disks is simple and strong inconstruction, and can therefore be manufactured at a comparatively smallcost, and will not be liable to break or get out of order. It isexceedingly effective in operation, and by its use every farmer cansharpen the cuttingdisks of his harrow or pulverizer without removingthe said disks from the shafts of the harrow and without taking any partof the harrow apart, thus avoiding the great expense of removing thedisks and taking them to a machine-shop to be sharpened.

It will be seen that the sharpening-blade can be adjusted to suit disksof any size or diameter, and that its angle can be nicely and accuratelyadj usted to sharpen the cutting-edge of the disks to the desired bevel.

Having thus described my invention, what I claim, and desire to secureby Letters Patent of the United States, is-

1. The combination ofa bar or body,one end of which is formed into ahandle, and asharpening-blade secured to the bar, said bar being adaptedto be secured to the shaft of a disk harrow and the blade adapted toengage with the periphery of the disks.

2. The combination of a slotted bar or body adapted to be secured uponthe shaft of a disk harrow, a knife-block adjustably secured to theslotted portion of the bar, and a sharpening-blade secured in saidblock.

3. The combination of a slotted bar or body adapted to be secured uponthe shaft of a disk harrow, a knife-block adjustably secured to theslotted portion of the bar, one end of which is provided with aperforation and the other end with a transverse slot, bolts through saidbar and said block, and a sharpeningblade secured in said block.

4. The combination of a bar or body portion adapted to be secured uponthe shaft of a disk harrow, a knifeblock secured thereto, provided witha slanting transverse slot, and

5 asharpeningblade having a rectangular shank secured therein. V

5. The combination of a bar or body adapted to be secured upon the shaftof a disk harrow, one end of which is formed into a handle and 10 theother end is curved inwardly, a set-screw in said curved portion, andasharpening-blade secured to the bar near the handle and adapted toengage with the periphery of the disks.

6. The combination of a. bar or body having a semicircular recess nearone end, and alsovr 5 with two perforations, a box having a slot at eachend and a semicircular recess at its middle and two turnbuttons throughthe perforations in the bar and through the box and a sharpening-bladesecured to the bar between 20' the box and one end of the bar.

In testimony that I claim the foregoing as my own I have hereuntoaffixed my signature in presence of two witnesses.

' HUGH DICK.

' Witnesses:

L; D. DANBY, J OHN VAN WoERT.

